sharp+lc 26af3m+series+service+manual

1st Edition

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X

SERVICE MANUALLCD COLOUR TELEVISION

LC-26AF3 M/H/X LC-32AF3 M/H/X MODELS LC-37AF3 M/H/XIn the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

CONTENTSPage IMPORTANT SERVICE SAFETY PRECAUTION ...................................................................................... 2 SPECIFICATIONS ...................................................................................................................................... 4 OPERATION MANUAL ............................................................................................................................... 5 DIMENSIONS ........................................................................................................................................... 10 REMOVING OF MAJOR PARTS .............................................................................................................. 12 ADJUSTMENT PROCEDURE .................................................................................................................. 20 TROUBLE SHOOTING TABLE ................................................................................................................ 35 MAJOR IC INFOMATIONS ....................................................................................................................... 49 OVERALL WIRING DIAGRAM ................................................................................................................. 52 BLOCK DIAGRAM .................................................................................................................................... 58 PRINTED WIRING BOARD ASSEMBLIES .............................................................................................. 68 PARTS LIST .............................................................................................................................................. 92 PACKING OF THE SET ......................................................................................................................... 131 SCHEMATIC DIAGRAM ........................................................................................................................ 132

SHARP CORPORATION


IMPORTANT SERVICE SAFETY PRECAUTION

Service work should be perfomed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow:ground, such as electrical conduit or electrical ground connected to an earth ground. Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resisor. Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. All checks must be repeated with the AC cord plug connection reversed. (If necessary, a nonpolarized adaptor plug must be used only for the purpose of completing these checks.) Any reading of 0.75V rms (this corresponds to 0.5 milliamp. rms AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the monitor to the owner.

WARNING1. For continued safety, no modification of any circuit should be attempted. 2. Disconnect AC power before servicing. CAUTION: FOR CONTINUED PROTECTION AGAINST A RISK OF FIRE REPLACE ONLY WITH SAME FUSE: F701, F702 (5A, AC250V) F703 (2A, DC450V)

BEFORE RETURNING THE RECEIVER (Fire & Shock Hazard)Before returning the receiver to the user, perform the following safety checks: 1. Inspect all lead dress to make certain that leads are not pinched, and check that hardware is not lodged between the chassis and other metal parts in the receiver. 2. Inspect all protective devices such as non-metallic control knobs, insulation materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc. 3. To be sure that no shock hazard exists, check for leakage current in the following manner. Plug the AC cord directly into a 110~240 volt AC outlet, and connect the DC power cable into the receiver's DC jack. (Do not use an isolation transformer for this test). Using two clip leads, connect a 50k ohm, 10 watt resistor paralleled by a 0.15F capacitor in series with all exposed metal cabinet parts and a known earth

DVM AC SCALE50k ohm 10W

0.15 F TEST PROBE

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

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SAFETY NOTICEMany electrical and mechanical parts in LCD television have special safety-related characteristics. These characteristics are often not evident from visual inspection, nor can protection afforded by them be necessarily increased by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features are identified by and shaded areas in the Replacement Parts Lists and Schematic Diagrams. For continued protection, replacement parts must be identical to those used in the original circuit. The use of a substitute replacement parts which do not have the same safety characteristics as the factory recommended replacement parts shown in this service manual, may create shock, fire or other hazards.

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2


Precautions for using lead-free solder1 Employing lead-free solder PWBs"of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder. Example:

LFaIndicates lead-free solder of tin, silver and copper.

2 Using lead-free wire solder When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause damage or accident due to cracks. As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40C, we recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldening bit, contact our service station or service ranch in your area. 3 Soldering As the melting point of lead-free solder (Sn-Ag-Cu) is about 220C which is higher than the conventional lead solder by 40C, and as it has poor solder wettabillty, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be excoeded, remove the bit from the PWB as soon as you conurm the steady soldering condition. Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to tum on and off the power of the bit as required. if a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it. When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.

Becareful when replacing parts with polarity indication on the PWB silk.

Lead-free wire solder for servicing Part No, Description ZHNDAi123250E J 0.3mm 250g(1roll) ZHNDAi126500E J 0.6mm 500g(1roll) ZHNDAi12801KE J 1.0mm 1kg(1roll)

Code BL BK BM

3


SpecificationsItemLCD panel Number of dots LC-26/32/37 AF3 M/X LC-26/32/37 AF3 H Video Colour System TV Function TV-Standard (CCIR) Receiving Channel VHF/UHF CATV

Model LC-26AF3 H/M/X26" (65 cm) Advanced Super View & BLACK TFT LCD

LC-32AF3 H/M/X32" (80 cm) Advanced Super View & BLACK TFT LCD

LC-37AF3 H/M/X37" (94 cm) Advanced Super View & BLACK TFT LCD

1,555,200 dots (960 x 540 x 3 dots) 3,147,264 dots (1366 x 768 x 3 dots) PAL/SECAM/NTSC 3.58/NTSC 4.43/PAL 60 PAL: B/G, D/K, I, PAL-60 SECAM: B/G, D/K, K/K1 NTSC: M 44.25-863.25 MHz Hyper-band, S1S41ch Auto Preset 99 ch, Auto Label, Auto Sort NICAM: B/G, I, D/K A2 stereo: B/G 450 cd/m2 60,000 hours (at Backlight Standard position) H : 170 V : 170 10W x 2 8 cm 2pcs

TV-Tuning System STEREO/BILINGUAL Brightness Backlight life Viewing angles Audio amplifier Speakers Terminals ANTENNA IN INPUT 1 INPUT 2 INPUT 3 INPUT 4 AV OUTPUT Headphones OSD language Power Requirement Power Consumption Weight Operating Temperature

UHF/VHF 75 Din type VIDEO in, AUDIO in, COMPONENT in VIDEO in, AUDIO in, COMPONENT in VIDEO in, AUDIO in, S-VIDEO in HDMI (HDMI input), AUDIO in VIDEO out, AUDIO out 3.5mm jack (Audio output) English/Chinese/Arabic AC 110240 V, 50 Hz 111 W (0.8 W Standby) (Method IEC60107) 13.0 kg (without stand) 17.0 kg (with stand) 0C - 40C 141 W (0.8 W Standby) (Method IEC60107) 17.0 kg (without stand) 22.5 kg (with stand) 169 W (0.8 W Standby) (Method IEC60107) 20.0 kg (without stand) 26.0 kg (with stand)

As a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement without prior notice. The performance specification figures indicated are nominal values of production units. There may be some deviations from these values in individual units.

4

TV (Front)

TV (Rear)SYSTEM RESET**

Channel up ( )/down ( ) buttons

TV/VIDEO buttonRESET*

Volume up (+)/down () buttons

POWER (On/Off) button

INPUT 4 (HDMI) terminals

INPUT 1 terminals

Operation Manual

INPUT 2 terminals

5INPUT 3 terminals AV OUTPUT terminals AC INPUT terminal Antenna input terminal Headphone jack

* Press RESET if the TV cannot return to its original state after performing various operations. This will reset the TV as shown below.Remote control sensor OPC sensor POWER indicator OPC indicator* SLEEP timer indicator AV MODE resets to USER. TV channel resets to channel 1. Audio setting initialises. Surround resets to Off. Image position is initialised. Still image mode deactivates. Teletext mode resets to normal. (LC-26/32/37 AF3 M/X Only) Audio Only setting resets to Off.


** Press SYSTEM RESET if the TV does not operate after starting up.NOTE Pressing RESET will not work if the TV is in standby mode (indicator lights red). Pressing RESET will not delete channel preset and password. See page for resetting the password. See page for initialising to the factor y preset values in case you forget your password.

*OPC: Optical Picture Control


LC-26/32/37 AF3 M/XRemote control unit1 2 10 11 12 3 131 (TELETEXT) Select the TELETEXT mode. (all TV image, all TEXT image, TV/TEXT image) (Freeze/Hold) Freeze a motion picture on the screen. TELETEXT mode: Stop updating Teletext pages automatically. Press again to release the hold mode. POWER (STANDBY/ON) To switch the power on and off. (SUBTITLE for TELETEXT) To turn the subtitles on and off. EXIT Turn off the On Screen Display. VOL-/VOL+ Set the volume. 0 9 Set the channel. TELETEXT mode: Set the page. (Flashback) Press to return to the previous image in normal viewing mode. MPX Select the sound multiplex mode. (Subpage) Reveal or hide subpages. SLEEP Set the Sleep timer. (Reveal hidden for TELETEXT) TELETEXT mode: Display hidden characters. DISPLAY Display the programme information. TELETEXT mode: Display the time information included in the Teletext broadcast. Display an index page for CEEFAX/FLOF information. RETURN MENU mode: Return to the previous menu screen. / / / (Cursor) Select a desired item on the setting screen. ENTER Execute a command. MENU Display the menu screen. Colour (RED/GREEN/YELLOW/BLUE) TELETEXT mode: Select a page. (MUTE) Mute the sound. CH/CH TV input mode: Select the channel. TELETEXT mode: Select the page. TV/VIDEO (INPUT SOURCE) Select an input source. (TV, INPUT 1, INPUT 2, INPUT 3, INPUT 4) WIDE Change the wide image mode. TELETEXT mode: Set the area of magnification. (full/upper half/lower half) SURROUND Select Surround settings.

LC-26/32/37 AF3 HRemote control unit10 1 2 111 2 3 4 5 6 7 8 9 10 FREEZE Freeze a motion picture on the screen. POWER (STANDBY/ON) To switch the power on and off. SURROUND Select Surround settings. EXIT Turn off the On Screen Display. MPX Select the sound multiplex mode. ROTATE Rotates the display in every direction. VOL-/VOL+ Set the volume. 09 Set the channel. (Flashback) Press to return to the previous image in normal viewing mode. SLEEP Set the Sleep timer. DISPLAY Display the programme information. RETURN MENU mode: Return to the previous menu screen. / / / (Cursor) Select a desired item on the setting screen. ENTER Execute a command. MENU Display the menu screen. OPC To switch the Optical Picture Control on and off. WIDE Change the wide image mode. (MUTE) Mute the sound. CH/CH TV input mode: Select the channel. TV/VIDEO (INPUT SOURCE) Select an input source. (TV, INPUT 1, INPUT 2, INPUT 3, INPUT 4)

2

3 4 5 6 7

8

4 5

14 15 16 17

9 10 11 12 13

3 4 5 6 7

12 13 14 15 16 17 18

11 12 13

6

14 15 16 17 18 19

18 1914 15

67 8 9

8

20 21 22

16 17 18 19

9

19

20

21

NOTE When using the remote control unit, point it at the TV.

22

NOTE When using the remote control unit, point it at the TV.

Using external equipmentYou can connect many types of external equipment to your TV, like a VCR, DVD player, HDTV tuner, game Connecting a DVD player console and camcorder. To view external source images, select the input source from TV/VIDEO on the remote control unit or TV/VIDEO on the TV. You can use the INPUT 1 or INPUT 4 (HDMI) terminal when connecting to a DVD player and other audiovisual equipment.

Displaying an external equipment imageExplanation here is for the setting when connecting DVD to INPUT1 terminal.

Displaying a DVD image (Example)

NOTE When using an HDMI-DVI conversion adapter, input the Audio Signal from the AUDIO terminal of INPUT 4.To watch an image from this input terminal, you need to select the input source and the input signal type.

1

To watch a DVD image, select INPUT1 from INPUT SOURCE menu using TV/VIDEO on the remote control unit or TV/VIDEO on the TV.INPUT SOURCE TV INPUT1 INPUT2 INPUT3 INPUT4

HDMI Cable (commercially available)

CAUTION To protect all equipment, always turn off the TV before connecting to a VCR, DVD player, HDTV tuner, game console, camcorder or other external equipment.

2

Select the desired signal type on Input Select in the Option menu. For INPUT1 signalMENU[Option ... Input Select]

Audio cable (commercially available)

Component cable (commercially available)

orHDMIAUTO

NOTE See pages for external equipment connection. Please refer to the relevant operation manual (VCR, DVD player, etc.) carefully before making connections. Each time TV/VIDEO is pressed, the input source toggles. If the image does not come in clearly, you may need to change the input signal type setting on the Input Select menu. Refer to your external equipment operation manual for the signal type.L-AUDIO-R Y PB PR (CB) (CR)

When using component cable, select COMPONENT for Input select in the menu.

7

DVD player

COMPONENT VIDEO

Connecting a VCRYou can use the INPUT 3 terminal when connecting a VCR and other audiovisual equipment.

The setting is stored and can be selected on the INPUT SOURCE menu.

To watch an image from this input terminal, you need to select the input source and the input signal type.

or

S-video cable (commercially available)

Composite cable (VIDEO/AUDIO) (commercially available)


S-VIDEO

VIDEO L-AUDIO-R

VCR


Connecting a game console or camcorderA game console, camcorder and some other audiovisual equipment are conveniently connected using the INPUT 3 terminals.NOTE The S-video terminal has priority over the video terminals. You can also connect the game console to INPUT 1 or 2 terminals to enjoy clearer picture.To watch an image from this input terminal, you need to select the input source and the input signal type.

Connecting an HDTV tunerYou can use the INPUT 2 terminal when connecting to an HDTV tuner and other audiovisual equipment.To watch an image from this input terminal, you need to select the input source and the input signal type.

or

Audio cable (commercially available)

Component cable (commercially available) When using component cable, select COMPONENT for Input select in the menu.

S-video cable (commercially available)

Composite cable (VIDEO/AUDIO) (commercially available)

L-AUDIO-R

Y PB PR (CB) (CR)

HDTV tuner

8S-VIDEO VIDEO L-AUDIO-R

Game console/Camcorder

AppendixTroubleshootingProblem No power.

Basic adjustment settingsMenu itemsPossible Solution Check if you pressed POWER on the remote control unit. If the indicator on the TV lights up red, press POWER. Is the AC cord disconnected? Has the power been turned on? External influences such as lightning, static electricity, etc., may cause improper operation. In this case, operate the unit after first turning the power off the TV or unplugging the AC cord and re-plugging it in after 1 or 2 minutes. Are batteries inserted with polarity (+ , -) aligned? Are batteries worn out? (Replace with new batteries.) Are you using it under strong or fluorescent lighting? Is a fluorescent light illuminated to remote control sensor?

List of men u items to help y ou with operationsPicture Setup

Unit cannot be operated.

Remote control unit does not operate.

Picture is cut off.

Is the image position correct? Are screen mode adjustments such as picture size made correctly? Adjust the picture tone. Is the room too bright? The picture may look dark in a room that is too bright. Check the colour system setting. Check the input signal setting.

Strange colour, light colour, or dark, or colour misalignment.

AV Mode OPC Backlight Contrast Brightness Colour Tint Sharpness Advanced Colour Temp. Black 3D-Y/C Monochrome Film Mode I/P Setting

Auto Installation Programme Setup Child Lock Input Label Position WSS 4:3 Mode Rotate Language * Text Language

Option

Power is suddenly turned off.

The units internal temperature has increased. Remove any objects blocking vent or clean. Check the power control setting. Is sleep timer set? Is connection to other equipment correct? Has input signal setup been done correctly after connection? Is the correct input selected? Is picture adjustment correct? Is the antenna connected properly? Is On selected in Audio Only?

Audio

No picture.

AV Mode Treble Bass Balance Surround

Audio Only DNR HDMI Setup Input Select Quick Shoot Colour System Demo

9

* LC-26/32/37 AF3 M/X OnlyPower Control

No sound.

Is the volume too low? Make sure that headphones are not connected.

No Signal Off No Operation Off

Cautions regarding use in high and low temperature environments When the unit is used in a low temperature space (e.g. room, office), the picture may leave trails or appear slightly delayed. This is not a malfunction, and the unit will recover when the temperature returns to normal. Do not leave the unit in a hot or cold location. Also, do not leave the unit in a location exposed to direct sunlight or near a heater, as this may cause the cabinet to deform and the LCD panel to malfunction. Storage temperature: 20C to +60C (4F to +140F).



DimensionsLC-26AF3 H/M/X400.7 160.7

Unit: mm

560

49.7 674

116 108

47.9

567.9

553

501

320.6

52

345.4

267.6

100

100

50

10

537.8


DimensionsLC-32/37AF3 H/M/X432 (453)

Unit: mm

631 (671) 87 (102) 804 (926) 116 (116) 108 (108)

700.4 (822.6)

640.4 (708.4)

579 (647)

395.1 (463.8)

61.4 (61.4)

395 (429.4)

200 (200)

290 (306)

200 (200)

115 (104)

The size of 37-inch model in parentheses.

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REMOVING OF MAJOR PARTS (LC-26AF3H/M/X)1. 2. 3. 4. 5. 6. Remove the Terminal Cover1. Remove the 1 lock screw 2 and detach the ID Cover. Remove the 4 lock screws 3 and detach the stand. Remove the 21 lock screws 4 and detach the Rear Cabinet. Remove the 2 lock screws 5 and the 4 lock screws 6 and detach the Center Angle. Loosen the 2 top cover assy fixing screws7, and unplug the connecting cable from the KM (P1200) connector of the AV unit to remove the top cover assy. 7. Remove the 3 lock screws 8 from Top Cover, and detach the KEY Unit.

Terminal Cover

4

4 1 2 4ID Cover

3

4 4Rear Cabinet

6

Center Angle

Stand

7Top Cover Assy KEY Unit

5

8

P1200

12

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X 8. Unplug the FFC/FPC wires from SC4651, SC4652, and SC1202 - SC3701. 9. Unplug the connecting cables from these connectors: CN702, CN1701, CN1702, CN1703, CN1704, CN1705, P5700, P1201, and P3900. 10.Remove the 9 lock screws 9 and detach the Power Unit. 11.Remove the 4 lock screws 0 and detach the Center Guide Angle. 12.LC-26AF3H/M:Remove the 5 lock screws q and detach the Main Unit. LC-26AF3X:Remove the 6 lock screws q. Detach the Main Unit and the Earth Wire. 13.Remove the 2 lock screws w and detach the Main Shield(Top) and Main Shield(Bottom) from Main Unit. 14.Remove the 2 intermediate connector junctions of the speaker boxes to detach the right and left speaker boxes. 15.Remove the 2 lock screws e and detach the R/C, LED Unit. 16.Remove the 4 lock screws r and 2 lock screws t and detach the AV Unit. Unplug the connecting cable from INV-GND. 17.Remove the 1 lock screw y and 4 lock screws u and detach the Chassis Frame and Tuner Shiled from AV Unit.

SC4651 SC1202 CN1705 P5700 P3900 SC3701

SC4652

CN1704 CN702 CN1702 CN1703 CN1701 INV-GND

P1201

11 11 12 16 15 14AV Unit

12

Main Shield(Top)

Earth Wire (LC-26AF3X only)

17

Main PWB

Chassis Frame

Tuner Shield

Main Shield(Bottom)

R/C LED Unit

9Center Guide Angle

13Speaker Box-R

10

Speaker Box-L Power Unit

13

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X 18.Loosen the 6 inverter unit assy fixing screws i, and unplug the connecting cables from the 8 lamp wire connectors to remove the inverter unit and inverter shield. 19.Remove the 2 lock screws o and detach the LCD Unit.

19 LCD Unit

19

18 CN7505 CN7506 CN7507 CN7508 CN7509 CN7510 CN7511 CN7512

Inverter Unit

14


REMOVING OF LCD PANEL UNIT (LC-26AF3H/M/X)20.Remove the 4 LCD Panel unit lock screws p and detach the LCD Panel unit. Detach the Difusion Sheets and Difusion Panel. 21.Remove the 6 Lamp Holder lock screws a and detach the Lamp Holders. Datach the Lamps.

Back Light Chassis

21

20 21

Lamp Ass'y (CLMP-A073WJ01) Lamp Holder (LHLDZA592WJKZ)

Diffusion Panel (PCOVUA064WJZZ) Diffusion Sheet (PSHEAPA353WJZZ)

LCD Panel (RLCDTA067WJZZ)

15


REMOVING OF MAJOR PARTS (LC-32/37AF3M/H/X)1. 2. 3. 4. 5. 6. 7. Remove the Terminal Cover1. Remove the 1 lock screw 2 and detach the ID Cover. Remove the 2 lock screws 3 and detach the Hinge Cover. Remove the 4 lock screws 4 and detach the stand. Remove the 21 lock screws 5 and detach the Rear Cabinet. Remove the 7 lock screws 6and detach the Center Angle. Loosen the 2 top cover assy fixing screws 7, and unplug the connecting cable from the KM (P1200) connector of the AV unit to remove the top cover assy. 8. Remove the 3 lock screws 8 from Top Cover, and detach the KEY Unit. 9. Remove the 2 intermediate connector junctions of the speaker boxes to detach the right and left speaker boxes.

5 2

ID Cover

2 1 6 Terminal Cover7

4

6 Rear CabinetCenter Angle 7

Stand 3 Hinge Cover

8 Top Cover Assy KEY Unit 9

P1200

Speaker Box-R

Speaker Box-L

16

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X 10.Unplug the FFC/FPC wires from SC4651, SC4652, and SC1202 - SC3701. 11.Unplug the connecting cables from these connectors: CN702, CN1701, CN1702, CN1703, CN1704, CN1705, P5700, P1201, P3900 and INV-GND. 12.Remove the 9 lock screws 9 and detach the Power Unit. 13.LC-32AF3X:Remove the 6 lock screws 0 and detach the Main Unit and the Earth Wire. Others: Remove the 5 lock screws 0 and conduct cloth (LC-37AF3X only). Detach the Main Unit. 14.Remove the 2 lock screws q and detach the Main Shield(Top) and Main Shield(Bottom) from Main Unit. 15.Remove the 2 lock screws w and detach the R/C, LED Unit. 16.Remove the 4 lock screws e and 2 lock screws r and detach the AV Unit. 17.Remove the 1 lock screw t and 4 lock screws y and detach the Chassis Frame and Tuneer Shiled from AV Unit.

SC3701 SC4651 SC4652 SC1202 P5700 P3900 CN1702 CN1704 CN702 CN1705 CN1703 CN1701 PN7523 PN7517

INV-GND

P1201

PN7622 PN7516

10 15 16 11 14 12 AV Unit 12Earth Wire (LC-32AF3X only)

Main Shield(Top)

17 Main PWB Chassis Frame Tuner Shield Main Shield(Bottom)

R/C LED Unit 13 Power Unit 10

17

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X 18.Loosen the 9 (LC-32AF3H/M/X) / 10 (LC-37AF3H/M/X) inverter unit assy fixing screws u, and unplug the connecting cables from the 10 lamp wire connectors to remove the inverter unit and inverter shield. 19.Remove the 3 lock screws i and detach the LCD Unit.

19LCD Unit

18CN7505 CN7506 CN7507 CN7508 CN7509 CN7510 CN7512 CN7513 CN7514

18CN7505 CN7506 CN7507 CN7508 CN7509 CN7511 CN7512 CN7513 CN7514 CN7515

Inverter Unit (LC-32AF3H/M/X) Inverter Unit (LC-37AF3H/M/X)

19

19

18

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X 20.Remove the 4 LCD Panel unit lock screws o and 4 lock screws p, 4 lock screws a and detach the LCD Panel unit. Detach the Difusion Sheets and Difusion Panel.(LC-32AF3H/M/X) Remove the 4 LCD Panel unit lock screws o and 4 lock screws p, 13 lock screws a and detach the LCD Panel unit. Detach the Difusion Sheets and Difusion Panel.(LC-37AF3H/M/X) 21.Remove the 6 Lamp Holder lock screws s and detach the Lamp Holders. Datach the Lamp Assy. (LC-32AF3H/M/X)Lamp Holder (LHLDZA589WJKZ) Back Light Chassis

REMOVING OF LCD PANEL UNIT (LC-32/37AF3M/H/X)

22

19 20 21 20 21(LC-37AF3H/M/X)Diffusion Panel (PCOVUA059WJZZ) Diffusion Sheet (PSHEAPA354WJZZ) LCD Panel (RLCDTA080WJZZ)

22Lamp Ass'y (CLMP-A074WJ01) Lamp Holder (LHLDZA589WJKZ)

Back Light Chassis

22Lamp Holder (LHLDZA623WJKZ)

19

22

Lamp Ass'y (CCLMP-A075WJ01) Lamp Holder (LHLDZA623WJKZ)

20 21Diffusion Panel (PCOVUA060WJZZ) Diffusion Sheet (PSHEAPA355WJZZ) LCD Panel (RLCDTA081WJZZ)

20

19


ADJUSTMENT PROCEDUREThe adjustment values are set to their optimum at the factory before shipping. If by any chance a value should become improper or a readjustment is required due to part replacement, make an adjustment according to the following procedure. Before adjustment, perform aging for approx. 60 minutes to stabilize the unit.

1.After replacement of any PWB and/or IC for repair, note the following.When replacing the following units, be sure to prepare the new units loaded with updated software. AV-UNIT : : : MAIN-UNIT : : : : : : DUNTKD304DE07/08/10 (LC-26AF3M/H/X) DUNTKD304DE01/02/03 (LC-32AF3M/H/X) DUNTKD304DE04/05/06 (LC-37AF3M/H/X) DUNTKD186FE06 (LC-26AF3M/H) DUNTKD186FE07 (LC-26AF3X) DUNTKD186FE08 (LC-32AF3M/H) DUNTKD186FE10 (LC-32AF3X) DUNTKD186FE04 (LC-37AF3M/H) DUNTKD186FE05 (LC-37AF3X)

2. Program rewriting procedureOutline Described below is how to write new control software into the flash memory in the unit via the outside computer. Preparation (1) PC with parallel port (printer port) (2) Parallel cable (Straight type) (3) Jig PWB (PAL JIGUIF-001) (4) 20-pin cable (1 in the figure below) (5) Application software for the rewriting program (IAP Writer) (6) Rewriting program Preparatory work Set the PC printer port to EPP or ECP from BIOS setting. (Settings are different depending on PCs; it is desirable that a skilled person performs this operation.) Install the application software for the rewriting program (IAP Writer) into the PC. Connect the PC and the jig PWB with the parallel cable. Rewrite the program.

20

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X Connecting the jig PWB and the unit

P2001 20 19 2 1

SC4651

SC2001 40 39 2 1

IC4503

SC4652

MAIN UNIT

IC3701 IC3300

IC3301 P1800 P4100

Rewriting procedure Unplug the AC cord during power up. Connect the jig PWB and the main PWB with the cable (20-pin). (Connect P5601 of the jig PWB and P2001 of the main PWB.) Start the application software for the REWRITING program (IAP Writer). (If start-up is impossible, recheck the procedure.) While holding down the TV system reset button, plug in the AC cord to turn on the power. LED on the jig PWB lights up. Jig PWB connection is automatically detected and the system is shifted to the program rewriting mode.

SC3701

20-pin cable 1 Jig PWB (PAL JIGUIF-001) S5610 S5610 S5609 S5607 VOL-UP S5606 VOL-DOWN S5602 CH-UP S5603 CH-DOWN S5605 SC5602 INPUT SC5601 P5601 S5611 S5612 MRDY SW JIG_PLUG SW S5604 RESET S5606 SYSTEM RESET SC5603

PC

S5601 POWER SW

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LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X The rewriting program (IAP Writer) on the PC dictates writing. (Writing conditions are indicated on the IAP Writer.) Wait until Step 5 is ended. When ended, exit the IAP Writer. Turn off the AC power of the unit. (Unplug the AC cord.) Remove the cable from the jig PWB and the main PWB. Turn on the Ac power of the unit to check for operation. (If INPUT SELECT and volume control are available, rewriting is completed.)

3. Entering and exiting the adjustment process mode(1) Before entering the adjustment process mode, press the "RESET button or adjust the menu image to reset the AV position. (2) Unplug the AC power cord of the running TV to force off the power. (3) While holding down "VOL (-)" and "TV/VIDEO" keys at once, plug in the AC power cord to turn on TV. The letter K appears on the upper left of the screen. (4) Next, hold down the "VOL (-)" and "CH ()" keys at once. Multiple lines of blue characters appearing onscreen indicate that the unit is now in the adjustment process mode. If you fail to enter this mode (the display is the same as normal startup), retry the procedure. (5) To exit the adjustment process mode after adjustment is completed, unplug the AC cord to force off the power. (When the power is turned off with the remote control, once plug the AC cord and after approx. 10 seconds plug it in again.) Caution: Use due care in handling the information described here lest the users should know how to enter the adjustment process mode. If the setting is tampered with in this mode, unrecoverable system damage may result.

22


4. Remote controller key operation and description of display in adjustment process mode(1) Key operation Remote controller key CH (/) VOL (+/) Cursor (UP/DOWN/LEFT/RIGHT) Function Moving an item (line) by one (UP/DOWN) Changing a selected item setting (+1/1) UP/DOWN: PAGE BACK/NEXT LEFT/RIGHT: Changing data (every ten) TV/VIDEO Input source switching (toggle switching) (TUNER -> INPUT1 -> INPUT2 -> INPUT3 -> INPUT4) CH UP/DOWN (Main unit & R/C) Moving items: BACK/NEXT Enter Key Executing a function ` Input mode is switched automatically when relevant adjustment is started so far as the necessary input signal is available.

(2) Description of display(3) Currently selected input (2) Current page title (4) Current color TV system (5) Destination

(1) Current page / Total pages

1/12 MAIN Version Dev Version CPLD Version

[INFO]

TUNER

AUTO

AUTO:EURO

Adjustment process menu header

NORMAL STANDBY CAUSE ERROR STANDBY CAUSE

1.XX (M 2005/XX/XX X X) XX C1 1RC_STNBY1) 0 2) 0 3) 0 OM OH OM OH OM OH 4) 0 5) 0 OM OH OM OH

(7) Parameters

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5. Adjustment process mode menuThe character string in brackets [ ] will appear as a page title in the adjustment process menu header.Page 1 Line 1 2 3 4 5 2 1 2 3 4 5 6 7 8 9 10 11 3 1 2 3 4 5 6 7 8 9 10 11 4 1 2 5 1 2 3 4 5 6 7 6 1 2 3 4 5 6 7 Item [INFO] MAIN Version Dev Version CPLD Version NORMAL STANDBY CAUSE ERROR STANDBY CAUSE [INIT] INDUSTRY INIT HOTELMODE Center Acutime RESET Backlight Acutime RESET Picture Read Pos X Picture Read Pos Y Picture Read Color Picture Read Signal Type Picture Read [PAL SECAM N358] RF AGC ADJ PAL+TUNER ADJ PAL ADJ SECAM ADJ N358 ADJ TUNER ADJ CONTRAST PAL CONTRAST SECAM CONTRAST N358 TUNER A DAC RF AGC [COMP 15K] COMP 15K ADJ COMP 15K CONTRAST [HDTV] HDTV ADJ HDTV CONTRAST HDTV CB GAIN HDTV CR GAIN HDTV Y OFFSET HDTV CB OFFSET HDTV CR OFFSET [HDMI] HDMI ADJ HDMI CONTRAST HDMI CB GAIN HDMI CR GAIN HDMI Y OFFSET HDMI CB OFFSET HDMI CR OFFSET Description Main version CPLD version Version display Version display Version display Remarks

Initialization to factory settings HOTEL MODE flag setting Main operating hours Main operating hours reset Backlight operating hours Backlight operating hours reset

OFF/ON OFF/ON Time ( 0H 30M) OFF/ON Time ( 0H 30M)

24

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X7 1 2 3 4 5 6 7 8 1 9 1 2 3 4 5 6 7 8 10 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 12 1 2 3 4 5 [RGB] RGB ADJ R GAIN G GAIN B GAIN R OFFSET G OFFSET B OFFSET [TUNER] TUNER TEST [M GAMMA INFO] MGAMMA IN 1 MGAMMA IN 2 MGAMMA IN 3 MGAMMA IN 4 MGAMMA IN 5 MGAMMA IN 6 MGAMMA IN WRITE MGAMMA IN RESET [M GAMMA 1-3] MGAMMA R 1 MGAMMA G 1 MGAMMA B 1 MGAMMA R 2 MGAMMA G 2 MGAMMA B 2 MGAMMA R 3 MGAMMA G 3 MGAMMA B 3 MGAMMA WRITE [M GAMMA 4-6] MGAMMA R 4 MGAMMA G 4 MGAMMA B 4 MGAMMA R 5 MGAMMA G 5 MGAMMA B 5 MGAMMA R 6 MGAMMA G 6 MGAMMA B 6 MGAMMA WRITE [ETC] EEP SAVE EEP RESTORE STANDBY CAUSE RESET AUTO INSTALLATION SW SYS MODEL COUNTRY

W/B adjustment

EEP writing of adjustment values Initialization of adjustment values

EEP writing of adjustment values

EEP writing of adjustment values

Saving adjustment values Restoring adjustment values

Writing adjustment values in the storage area Writing back stored adjustment values

Selecting region

Displaying selected regions

6. Special features` STANDBY CAUSE (Page 1/12)

To indicate the reason code when the unit last enters standby. When the unit enters standby, the cause of the error is recorded on EEPROM as much as possible. When repairing a defective unit, checking adjustment values may useful for detecting abnormalities. ` EEP SAVE (Page 12/12) Storage of EEP adjustment value ` EEP RECOVER (Page 16/16) Retrieval of EEP adjustment value from storage area

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7. LCD panel adjustmentCOM BIAS AdjustmentAdjustment Item 1 COM BIAS Adjustment conditions Visual inspection Adjustment procedure

1. Enter the adjustment process mode according to 11. Display adjustment procedure. 2. Bring the cursor (UP/DOWN) on [COMBIAS] item (11-3) and select the value with the cursor (RIGHT/LEFT). 3. When changing values with the cursor (UP/DOWN), the test pattern appears. Minimize the flicker in the center of the screen. 4. After minimizing the flicker, press [ENTER] of the remote control to exit the adjustment process mode.

`

Adjust COM BIAS before taking 8. Video signal adjustment procedure.

8. Video signal adjustment procedure * The adjustment process mode menu is listed in Section 5.(1) Signal check Signal generator level adjustment check (Adjustment to the specified level) Composite signal NTSC : 0.714Vp-p 0.02Vp-p (Pedestal to white level) Composite signal PAL : 0.7Vp-p 0.02Vp-p (Pedestal to white level) RGB signal : 0.7Vp-p 0.02Vp-p 15K component signal : Y level 0.7Vp-p0.02Vp-p (Pedestal to white level) (50 Hz) PB, PR level 0.7Vp-p 0.02Vp-p 33K component signal : Y level 0.7Vp-p 0.02Vp-p (Pedestal to white level) PB, PR level 0.7Vp-p 0.02Vp-p (2) Entering the adjustment process mode Enter the adjustment process mode according to Section 3. (3) RF AGC adjustmentAdjustment point 1 Setting Adjustment conditions [Signal] PAL_Sprit_Colour_Bar E-12 ch, RF signal [Terminal] TUNER_RF Adjustment procedure

Feed the PAL_Split Colour bar signal (E-12ch) to TUNER_RF. 100% white[E-12CH]

100% white 2 Auto adjustment Page 3/12 performance Bring the cursor on [RF AGC ADJ] and press [OK]. [RF AGC ADJ OK] appears when finished.

26

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X (4) PAL signal & tuner adjustmentAdjustment point 1 Setting Adjustment conditions Adjustment procedure [Signal] Feed the PAL_Full-field_Colour_bar signal (75% colour saturation) to INPUT-1 VIDEO IN. PAL_Full_Field_ Colour_Bar_RF signal Feed the RF signal (E-12ch) to TUNER. Make sure the PAL_Colour-bar (E-12ch) has the sync level of 7:3 with the picture level. PAL_Split_Colour_ [E-12CH] [VIDEO IN SIGNAL] Bar E-12ch, RF signal [Terminal] INPUT-1 VIDEO IN TUNER_RF 100% white 2 Auto adjustment Page 3/12 performance 100% white

Bring the cursor on [PAL + TUNER ADJ] and press [OK]. [PAL + TUNER ADJ OK] appears when finished.

(5) SECAM signal adjustmentAdjustment point 1 Adjustment Adjustment conditions Adjustment procedure

Feed the SECAM_Full-field_Colour_bar signal (75% colour saturation) [Signal] to INPUT-1 VIDEO IN. SECAM_Fullfield_Colour_bar signal [Terminal] INPUT-1 VIDEO IN 100% white

2

Auto adjustment Page 3/12 performance

Bring the cursor on [SECAM ADJ] and press [OK]. [SECAM ADJ OK] appears when finished.

(6) N358 signal adjustmentAdjustment point 1 Adjustment Adjustment conditions [Signal] N358_ Full-Field_Colour_Bar [Terminal] INPUT-1 VIDEO IN Adjustment procedure Feed the N358_Full-field_Colour_bar signal (75% colour saturation) to INPUT-1 VIDEO IN.

100% white

2


Bring the cursor on [N358 ADJ] and press [OK]. [N358 ADJ OK] appears when finished.

27

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X (7) ADC adjustment (Component 15K)Adjustment point 1 Adjustment Adjustment conditions Adjustment procedure Feed the COMPPNENT 15K_100%_Full-field_Colour_bar signal (100% [Signal] colour saturation) to INPUT-1 COMPONENT IN. COMP_15K, 60Hz_ 100%_Full-Field_Colour_ Bar signal [Terminal] INPUT-1 COMPONENT 100% white IN

2


Bring the cursor on [COMP15K ADJ] and press [OK]. [COMP15K ADJ OK] appears when finished.

(8) ADC adjustment (Component 33K)Adjustment point 1 Adjustment Adjustment conditions Adjustment procedure Feed the COMPONENT 33K_100%_Full-field_Colour_bar signal [Signal] (100% colour saturation) to INPUT-1 COMPONENT IN. COMP_33K_ 60Hz_100%_Fullfield_Colour_bar signal [Terminal] INPUT-1 COMPONENT 100% white IN

2


Bring the cursor on [HDTV ADJ] and press [OK]. [HDTV ADJ OK] appears when finished.

(9) HDMI signal adjustmentAdjustment point 1 Adjustment Adjustment conditions Recommended signal generator: Leader Electronicsmade LT448 [Terminal] HDMI IN Adjustment procedure Set the output signal to 1080i/59.94(30sF) RGB digital output. Set the signal to the Full-Colour-bar (100% saturation). 8 bars including the rightmost black bar; Dynamic range: min 16/max 235 Feed the signal to HDMI IN from the signal generators DVI terminal through the DVI-HDMI conversion cable.

100% white

2

Auto adjustment Page 6/12

Bring the cursor on [HDMI ADJ] and press [OK]. [HDMI ADJ OK] appears when finished.

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9. White Balance Adjustment9-1. White balance adjustmentAdjustment point 1 Adjustment Adjustment conditions Place a luminance meter on the center of the screen. Adjustment procedure 1. Carry out aging for approx. 60 minutes. 2. Connect the white balance adjustment jig (luminance meter).

2

Auto adjustment

[Adjustment procedure] Adjustment gradations values (IN) are shown on Page 9, and adjustment initial values (OUT), on Pages 10 and 11, respectively. For white balance adjustment, adjust the OUT values shown on Pages 10 and 11. Set the specified gradation for point 6, and adjust RGB to the reference values of point 6. Set the specified gradation for point 1. Set G of point 1 to the default value [(adjusted G value of point 6)/896, with fractions rounded] and adjust RB to the reference values of point 1. Set the specified gradation for point 2. Set G of point 2 to the default value [(adjusted G value of point 6)/896, with fractions rounded] and adjust RB to the reference values of point 2. Set the specified gradation to point 3. Set G of point 3 to the default value [(adjusted G value of point 6)/896, with fractions rounded] and adjust RB to the reference values of point 3. Set the specified gradation to point 4. Set G of point 4 to the default value [(adjusted G value of point 6)/896, with fractions rounded] and adjust RB to the reference values of point 4. Set the specified gradation to point 5. Set G of point 5 to the default value [(adjusted G value of point 6)/896, with fractions rounded] and adjust RB to the reference values of point 5. [Reference values for adjustment reference]: Luminance meter [Minolta CA-210] Point 1 reference values: x = 0.272, y = 0.277 (98 gradations) (196 gradations) Point 2 reference values: x = 0.272, y = 0.277 (136 gradations) (272 gradations) Point 3 reference values: x = 0.272, y = 0.277 (248 gradations) (496 gradations) Point 4 reference values: x = 0.272, y = 0.277 (324 gradations) (648 gradations) Point 5 reference values: x = 0.272, y = 0.277 (396 gradations) (792 gradations) Point 6 reference values: x = 0.272, y = 0.277 (448 gradations) (896 gradations) Specified value for adjustment: 0.004 0.006 (point 1) Specified value for adjustment: 0.002 0.004 (other than the above) Specified value for inspection: Specified value for inspection:

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LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X 9-2. Outline of white balance adjustment Multiple point adjustment is available to reduce colour differences among gradations. Up to 6-point adjustment is possible; the number of adjustment points is variable. [Multiple point adjustment] When adjusting less than 6 points, set both input and output values of unused gradations (from the smallest number of gradations) to 0. The gamma table of 256 gradations is created by connecting gradations. 0 and 1 gradation are simply connected with a straight line. A straight line from 6 to 255 gradations is created by using the gradient of the line between 5 and 6 gradations.6-point adjustment

gradation 1 gradation 3 gradation 5 gradation 2 gradation 4 gradation 6

4-point adjustment

gradation 1 gradation 3 gradation 4 gradation 2

gradation 5 gradation 6

Both input and output values of 1 and 2 gradations are set to 0. Accordingly the gamma table for 4-point adjustment is artificially created.

`

Note After adjustment, select MGAMMA_WRITE to write the monitor gamma table.

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10. Initialization to factory settingsCaution: In the factory settings, all user setting data including the channel settings are initialized. (The adjustments made in the adjustment process mode are not initialized.) Keep this in mind when initializing these settings. After adjustment, exit the adjustment process mode as follows: Unplug the AC power cord from the outlet to force off the power. (When the power is turned off with the remote control, once unplug the AC power cord and after 10 seconds plug it in again.)Adjustment item 1 Factory settings Adjustment conditions Turn off the AC power to exit the adjustment process mode. Adjustment procedure Use the [R/C] VOL UP key on Page 2 to turn "ON" INDUSTRY INIT and then press [R/C] OK key. "////////" appears and then SUCCESS appears if the setting is completed. The followings are initialized to factory settings. 1) Use settings 2) Channel data (e.g. broadcast frequencies) 3) Manufacturers option settings 4) Password data

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11. Display adjustment procedure11-1. Entering and exiting the display process mode (1) Before entering the display process mode, press the RESET button or adjust the menu image to reset the AV position. (2) Unplug the AC power cord of the running TV set to force off the power. (3) While holding down VOL (+) and CH() keys at once, plug in the AC power cord to turn on TV. The letter K appears on the screen. (4) Next, press either VOL (+/-) or CH (/) of the remote control. Multiple lines of red characters appearing onscreen indicate that the unit is now in the display process mode. If you fail to enter this mode (the display is the same as normal startup), retry the procedure. (5) To exit the display process mode after the adjustment is completed, unplug the AC cord to force off the power. (When the power is turned off with the remote control, once unplug the AC cord and after 10 seconds plug it in again.) Caution: Use due care in handling the information described here lest the users should know how to enter the display process mode. If the setting is tampered with in this mode, unrecoverable system damage may result.

11-2. Key function table in display process modeKey Cursor UP ' Cursor DOWN " Cursor RIGHT | Cursor LEFT \ ENTER TV/VIDEO CH () CH () VOL () VOL (+) Function 1 (when on the left side of a page) Moving up by one item or moving to the previous page (when at the top) Moving down by one item or moving to the next page (when at the bottom) Moving to the right by one item or moving to another page (in the case of the initial page) Moving to the left by one item or moving to another page (in the case of the initial page) Test pattern off Function 2 (when changing a numeric value) Incrementing the adjustment value by one or executing the item (in the case of W or R items) Decrementing the adjustment value by one or executing the item (in the case of W or R items) Moving to the right by one item Moving to the left by one item

Executing the item (in the case of W or R items) Moving to the next page Moving to the next page Moving up by one item or moving to the Incrementing the adjustment value by one or previous page (when at the top) executing the item (in the case of W or R items) Moving down by one item or moving to the next Decrementing the adjustment value by one or page (when at the bottom) executing the item (in the case of W or R items) Moving to the right by one item or moving to Moving to the right by one item another page (in the case of the initial page) Moving to the left by one item or moving to Moving to the left by one item another page (in the case of the initial page)

32

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X 11-3. List of adjustment process modes (Display)

33

LC-26AF3 M/H/X LC-32AF3 M/H/X LC-37AF3 M/H/X 11-4. Lamp error detection (1) Function This LCD color TV set incorporates the lamp error detection feature that automatically turns off the power for safety. If the lamp or the lamp circuit is defective or if the lamp error detection is activated for some reason, the following will result. 1 The power is interrupted in approx. 6 seconds after turned on.(The power LED on the front of the TV set turns from green to red and keeps blinking in red: ON for 250ms; OFF for 1 sec) 2 If the phenomenon mentioned in 1 above occurs five consecutive times, the power cannot be turned on.(The LED keeps blinking in red: ON for 250ms; OFF for 1 sec) (2) Measures 1 Checking with lamp error detection OFF Enter the display process, referring to 11-1. Entering and exiting the display process mode. If the lamp or the lamp circuit is defective, the lamp will go out. (The power LED is green.) Thus abnormalities can be checked. 2 Resetting the lamp error circuit After checking for abnormality in the lamp or the lamp circuit, reset the lamp error count. If the lamp error is detected five consecutive times, the power cannot be turned on. Use the cursor (UP/DOWN) key to move to [L ERR RESET], (Line 4) on the display process mode service page. Then use the cursor (LEFT/RIGHT) key to select the [L ERR RESET] value. Finally press the cursor (UP/DOWN) key to reset the value to 0.

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TROUBLE SHOOTING TABLENo power-up even if the power is turned on (Front LED does not changed from red to green)Are the power cable and harness in the unit properly connected? (Inside POWER-UNIT) Are F701 and F702 normal?YES YES NO NO

Connect the power cable and harness properly, and turn on the power. Is the fuse till blown when turning on the power after replacing F701 and F702?NO YES

Is a voltage of BU3.3V applied to the pin (5) of CN1701?YES NO

Is there BU3.3V output immediately after the power is supplied?NO YES

Replace D706, D707, Z702, R741, and R744.

Replace Q705, RC702, Z701, R726, and R784.

Is a voltage of BU3.3V applied to the pin (9) of CN1702?YES

NO

Check Q1708, Q1718, Q1719, Q1720, and R1761. Check Q709, Q716, Q1709, and PC704. Check Q705, RC702, Z701, R726, and R784. Check Z901, Q706, Q707, Q717, and R735. Check D1702, Q1701, Q1702, R1713, and DZ1701. Check ICs (Z1703-Z1705) for each output, switches (Q17031707), and diodes (D1703, RC1705, and RC1706).

Is a click heard when the relay is turned on?YES

NO

Is a voltage of approx. 380V generated at C720 when the power is supplied?YES

NO

Is UR14V generated at the pin (5) of CN1702?YES

NO

Is UR35V generated at the pin (6) of CN1701?YES

NO

Are UR6V, UR4.3V and UR3.5V outputs normal?

NO

[(Main) Power OFF sequence]

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TROUBLE SHOOTING TABLE (Continued)No sound (1) (during the reception of TV broadcasting) No audio output during UHF/VHF reception Confirmation of the settings: 1) Is the volume set to MIN or MUTE on the remote control? Set the desired volume. 2) Are headphones connected to HEADPHONE (J1203)? Disconnect them. 3) Is the ANT-cable disconnected or connected improperly? See the operation manual and connect it correctly. Are the audio signals (L/R) sent from pins (28) and (27) of IC2501 (MSP)?YES NO

Is the IF signal (ANA_IN1+) sent to pin (67) of IC2501 (MSP)?NO

YES

Check that +5 V and +8 V is supplied respectively to pin (65) and pin (39) of IC2501, or check peripheral circuits. Check Q2500 (AMP) and peripheral circuits. Check SF1101 and peripheral circuits.

Is the audio signal output of pins (7) and (1) of IC2504 normal?YES

NO

Check IC2504 or peripheral circuits. Check IC3900/IC3901 (AUDIO-AMP) or peripheral circuits. Check P3900 (AUDIOCONNECTOR) and peripheral circuits.

Is the audio signal (S-OUT) sent from pin (12) of IC1104 (IF-DEMOD)?NO

YES

Is the audio signal output of pin (4) of IC3900/IC3901 (AUDIO-AMP) normal?YES

NO

Is the IF signal sent from pin (11) of TUNER (TU1100)?NO

YES

Is the audio signal output of pins (1) and (4) of P3900 (AUDIOCONNECTOR) normal?YES

NO

Check that 33 V and 5 V is supplied respectively to pin (9) and pin (7) of TUNER (TU1100), or check their peripheral components.

Check the left and right SPBOX and wire harnesses.

No monitor sound (2) (sound from EXT terminal to external devices during the reception of TV broadcasting) No audio output from EXT1 terminal. Is output (IN1-L/R-OUT) of pins (37) and (36) of IC2501 (MSP) normal?YES

No audio output from EXT2 terminal. Is output (IN2-L/R-OUT) of pins (34) and (33) of IC2501 (MSP) normal?YES

No audio output from EXT3 terminal. Is output (IN2-L/R-OUT) of pins (34) and (33) of IC2501 (MSP) normal?YES

Is AUDIO output signal (IN1-L/R-OUT) supplied to pins (3) and (1) of EXT1 (SC1201)?NO

Is AUDIO output signal (IN2-L/R-OUT) supplied to pins (3) and (1) of EXT2 (SC1200)?NO

Is AUDIO output signal (IN3-L/R-OUT) supplied to pins (4) and (3) of EXT3 (J1201)?NO

Check S1-Mute circuits Q1203/Q1204 and S1-MUTE-LINE (pin 64 of IC1203). Q1203/4 S1-MUTE

Check S2-Mute circuits Q1200/Q1201 and S2-MUTE-LINE (pin 66 of IC1203). Q1200/1 S2-MUTE

Check A-Mute circuits Q1206/Q1207 and AMUTE-LINE (pin 72 of IC1203). Q1206/7 A-MUTE

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TROUBLE SHOOTING TABLE (Continued)No sound (3) (output to external devices) No audio output from the headphones Is there audio output on pins (2) and (3) of the headphone terminal (J1203)?NO

No audio output from SCART-1 (EXT-1)

No audio output from SCART-2 (EXT-2)

No audio output from EXT-3

Confirmation of the settings: 1) Is the MUTE button on the remote control set to ON? Set to OFF. 2) Check the connection to external devices. Is there any improper connection? Is audio signal sent to pins (3) and (1) of SCART-1 (SC1201)?YES NO NO

Is audio input/output signal of pins (3) and (5)/(1) and (7) of IC2506 (HP-AMP) normal?NO

Is audio signal sent to pins (3) and (1) of SCART-2 (SC1200)?YES

NO

Is audio signal sent to pins (4) and (3) of EXT-3 external connector (J1201)?YES

Is audio output signal (HP-OUT) properly sent from pins (25) and (24) of IC2501 (MSP)?NO

Check the connection to SCART-1 (SC1201) and external devices.

Check the connection to SCART-2 (SC1200) and external devices.

Check the connection to EXT-3 (J1201) and external devices.

Check audio input signal of pin (67) of IC2501 (MSP); pins (65) and (39) of the power line; pins (2) and (3) of I2C-LINE; and peripheral circuits. Is S1-MUTE signal at H? (Q1203/Q1204)NO

Are S2-MUTE signal and AMUTES signal at H? (Q1200/01, Q1206/07)NO NO NO

Is audio signal sent from pins (37) and (36) of IC2501?YES

Is audio signal sent from pins (34) and (33) of IC2501?YES

Check the audio signal output line from pins (37) and (36) of IC2501 to pins (3) and (1) of EXT1.

Check the power supply 5/8 V pins (65) and (39) of IC2501 and peripheral circuits.

Check the audio signal output line from pins (34) and (33) of IC2501 to Q1215/Q1216.

37


TROUBLE SHOOTING TABLE (Continued)No sound (4) (from external input devices) No external audio input signal which is sent from SCART1 Is IN1-L audio signal sent from pin (6) of SCART terminal (SC 1201) to pin (56) of IC2501 (MSP)? Is IN1-R audio signal sent from pin (2) of SCART terminal (SC 1201) to pin (57) of IC2501?YES NO

No external audio input signal which is sent from SCART2 Is IN2-L audio signal sent from pin (6) of SCART terminal (SC 1200) to pin (53) of IC2501 (MSP)? Is IN2-R audio signal sent from pin (2) of SCART terminal (SC 1200) to pin (54) of IC2501?YES NO

No external audio input signal which is sent from EXT3 Is IN3-L audio signal sent from pin (3) of J1202 terminal to pin (50) of IC2501? Is IN3-R audio signal sent from pin (5) of J1201 terminal to pin (51) of IC2501?YES NO

No external audio input signal which is sent from EXT4 (HDMI-ANALOG AUDIO) Is HDMI-L audio signal sent from J1900 to pin (3) of IC1906? Is HDMI-R audio signal sent from J1900 to pin (7) of IC1906?YES

No external audio input signal which is sent from EXT4 (HDMI-DIGITAL AUDIO) Is HDMI-L audio signal sent to pin (1) of IC1906? Is HDMI-R audio signal sent to pin (6) of IC1906?YES NO

Check the connection to pins (6) and (2) of SCART1 and to external devices.

Check the connection to pins (6) and (2) of SCART2 and to external devices.

Check the connection to pins (3) and (5) of EXT3 (J1202 and J1201 respectively); and to external devices.

Is HDMI-L audio signal sent to pin (47) of IC2501? Is HDMI-R audio signal sent to pin (48) of IC2501?YES NO

Check output of pins (11) and (10) of IC1905, and check IC1904 (HDMIRECEIVER), HDMI terminal (SC1900).

Check output of pins (15) and (11) of IC1906, or peripheral circuit.

Is audio signal properly sent from pins (28) and (27) of IC2501?YES

NO

Check IC2501 or peripheral circuits. Check IC2504 or peripheral circuits. Check IC3901/IC3900 (MAIN-AMP) or peripheral circuits.

Is audio signal properly sent to pins (7) and (1) of IC2504 (OP-AMP)?YES

NO

Is audio output signal of pin (4) of IC3901/IC3900 (MAIN-AMP) normal?YES

NO

Check the connector P3900 and right and left SP-BOX.

38


TROUBLE SHOOTING TABLE (Continued) No picture (1)

No picture appears on LCD during the tuner (U/V) reception. Confirmation of the settings: 1) Is "INPUT SOURCE" button on the remote control set up correctly? See the operation manual and set "INPUT SOURCE" to "TV". 2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to "MIN"? Set it to an appropriate level. 3) Is ANT-cable disconnected, or incorrectly connected? Connect it correctly as per the operation manual.YES

Is the video signal (IF) sent from pin (11) of tuner (TU1100)?YES

NO

Check the tuner (TU1100) and peripheral circuits. Check SF1102 (SAW-FIL), IC1104 and peripheral circuits. Check IC1100 (VCA), IC1203 (V-SEL) and peripheral circuits.NO

Is video signal sent from pin (17) of IC1104 (IF-DEMOD)?YES

NO

Is the video signal (CVBSTUNER) sent to pin (17) of IC1203 (V-SEL)?YES

NO

Is CVBS signal sent from pin (51) of IC1203?YES

Check 9V power line pins (6), (47) and (57) of IC1203 (V-SEL) and peripheral circuits. Check IC3300 (V-PROCESSOR), Q3706/3707 and peripheral circuits. Check IC3300 (V-PROCESSOR) or peripheral circuits.

Is CVBS1 signal sent to pin (242) of IC3300 (V-PROCESSOR)?YES

NO

Is LVDS video signal (TA1 - TD1) sent from pins (36)/(37) (26)/(27) of IC3300 (V-PROCESSOR), and is CLK signal (RCLK1) sent from pin (28)/(29)?YES

NO

Is R/G/B digital video signal (RMS/GMS/BMS) sent from pin [2734]/[37-42]/[47-50] of IC4601 (LVDS-RECEIVER), and is SYNC signal (HS/VS) sent from pin (3)/(5)?YES

NO

Check IC4601 (LVDS-RECEIVER) and peripheral circuits.

Is digital RGB-right signal (RR**/RG**/RB**) sent from pins (203) and (2) - (16) and (23) of IC4502 (LCD-CONTROL), and is digital RGB-left signal (LR**/LG**/LB**) sent from pins (26) and (33) (47) and (54)?YES

NO

Check IC4502 (LCD-CTL) and peripheral circuits.

Check LCD connector SC4651/SC4652 or LCD-PANEL-UNIT.

39



SCART1: No picture appears on EXT1-connected monitor during the tuner (U/V) reception.

SCART2: No picture from EXT1 appears on EXT2connected monitor.

SCART2: No picture from EXT3 appears on EXT2connected monitor.

Confirmation of the settings: 1) Are input terminal on back of TV and "INPUT SOURCE" button on the remote control set up correctly? See the operation manual and set "INPUT SOURCE" appropriately. 2) Is the specified device selected for Signal Type (item) in MENU-Option-Input Select? Set it to "CVBS", "Y/C" or "RGB". 3) Is ANT-cable disconnected, or incorrectly connected to the external device? Connect it correctly as per the operation manual. Is video signal sent to pin (19) of SCART1 (SC1201)?NO

YES

Check SCART1, external connection or input setting. Check SCART1 (SC1201), IC1201 (VCA) and peripheral circuits. Check IC1201 (DRIV), IC1100 (VCA) and peripheral circuits. Check IC1104 (IFDEMOD), IC1100 (VCA) and peripheral circuits. Check SF1102 (SAW-FIL), IC1104 and peripheral circuits.

Is video signal sent to pin (19) of SCART2 (SC1200)?NO

YES

Check SCART2, external connection or input setting. Check IC1202 (DRIV), SCART2 (SC1200) and peripheral circuits. Check IC1203 (VSEL) and peripheral circuits. Check SCART1, IC1203 (V-SEL) and peripheral circuits.

Is video signal sent to pin (19) of SCART2 (SC1200)?NO

YES

Check SCART2, external connection or input setting. Check IC1202 (DRIV), SCART2 (SC1200) and peripheral circuits. Check IC1203 (VSEL) and peripheral circuits. Check A/Vterminal (J1202), IC1203 (V-SEL) and peripheral circuits.

Is the video signal (TUNER-V-OUT) sent from pin (2) of IC1201 (VCA)?NO

YES

Is the video signal (MON-OUT) sent from pin (48) of IC1203 (V-SEL)?NO

YES

Is the video signal (MON-OUT) sent to pin (48) of IC1203 (V-SEL)?NO

YES

Is the video signal (CVBS-TUNER) sent from pin (5) of IC1100 (VCA)?NO

YES

Is the video signal (IN1-V) sent to pin (65) of IC1203 (VSEL)?NO

YES

Is the video signal (IN3-V) sent to pin (3) of IC1203 (VSEL)?NO

YES

Is the video signal (CVBS) sent from pin (17) of IC1104 (IF-DEMOD)?NO

YES

Is video signal sent to pin (20) of SCART1?NO

YES

Is video signal sent to pin (3) of A/V-terminal (J1202)?NO

YES

Is the video signal (IF) sent from pin (11) of tuner (TU1100)?NO

YES

Check SCART1, external connection or input setting.

Check A/Vterminal (J1202), external connection or input setting.

Check 5/33 V power supply pins (7) and (9) and I2C-Line pins (5) and (4) of tuner (TU1100), and peripheral circuits.

40



EXT1 in trouble.

EXT1-RGB in trouble.

EXT1-Y/C in trouble.

Confirmation of the settings: 1) Is "INPUT SOURCE" button on the remote control set up correctly?See the operation manual and set "INPUT SOURCE" to "EXT1". 2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to "MIN"?Set it to an appropriate level. 3) Check the connection to the external deviceConnect it correctly as per the operation manual for the device. Is composite video signal sent to pin (20) of SCART1 (SC1201)?YES

NO

Check external connection, input setting, SCART1 (SC1201) and peripheral circuits. Check SCART1 (SC1201) and peripheral circuits.

Is RGB signal sent to pins (15), (11) and (7) of SCART1 (SC1201)?YES

NO


Is Y/C signal sent to pins (20) and (15) of SCART1 (SC1201)?YES

NO


Is the composite video signal (IN1V) sent to input terminal pin (65) of IC1203 (VSELECTOR)?YES

NO

Are RGB signals (R1, G1 and B1) sent to input terminal pins (25), (21) and (23) of IC1203 (VSELECTOR)?YES

NO

Is Y/C signal (IN1Y/C1) sent to input terminal pins (67) and (69) of IC1203 (V-SELECTOR)?YES

NO

Is the composite video signal (CVBS) sent from output terminal pin (51) of IC1203 (VSELECTOR)?YES

NO

Check IC1203 (VSELECTOR) and peripheral circuits.

Is RGB signal (R/G/B-SIG) sent from output terminal pins (54), (56) and (55) of IC1203 (VSELECTOR)?YES

NO


Is Y/C signal (Y/CSIG) sent from output terminal pins (52) and (50) of IC1203 (VSELECTOR)?YES

NO


Is the composite video signal (CVBS1) sent to input terminal pin (242) of IC3300 (VPROCESSOR)?YES

NO

Check IC3300 (VPROCESSOR), Q3706/Q3707 and peripheral circuits.

Is RGB signal (R/G/B-SIG3) sent to input terminal pins (54), (48) and (43) of IC3701 (A/D-CONV)?YES

NO

Check pins (54), (56) and (55) of IC1203 (V-SEL), Q3712/11/10 and peripheral circuits.

Is Y/C signal (CVBS2/C-SIG1) sent to input terminal pins (244) and (231) of IC3300 (VPROCESSOR)?YES

NO


Is digital signal (R/G/B-8bit) sent to input terminal pins (45/69) - (55/46) of IC3300 (VPROCESSOR)?YES

NO

Check pins (66) and (64) for ADHS/VS signal, IC3701 (A/DCONV) and peripheral circuits.NO

Is LVDS signal (TA - TD) sent from pins (36) and (26) - (27) and (31) of IC3300 (V-PROCESSOR), and is CLK signal (RCLK1) sent from pin (28)/(29)?YES

Check IC3300, pins (28) and (29) for RCLK signal, and peripheral circuits. Check IC4601, pins (3) and (5) for HS/VS signal, and peripheral circuits. Check IC4502 and peripheral circuits. Check IC4502, LCDCONNECTOR, SC4651/4652 and peripheral circuits.

Is the digital signal (RMS/GMS/BMS) sent from pins (27) and (34) - (47) and (50) of IC4601 (LVDS-RECEIVER), and is SYNC signal (HS/VS) sent from pin (3)/(5)?YES

NO

Is digital RGB-right signal (RR**/RG**/RB**) sent from pins (203) and (2) - (16) and (23) of IC4502 (LCD-CONTROL), and is digital RGB-left signal (LR**/LG**/LB**) sent from pins (26) and (33) - (47) and (54)?YES

NO

Is digital RGB signal sent to pins (14) and (21) - (42) and (49) of LCD-CONNECTOR SC4651/4652?YES

NO

Check the LCD panel.

41



EXT2 in trouble.

EXT2-RGB in trouble.


Confirmation of the settings: 1) Is "INPUT SOURCE" button on the remote control set up correctly?See the operation manual and set "INPUT SOURCE" to "EXT2". 2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to "MIN"?Set it to an appropriate level. 3) Check the connection to the external deviceConnect it correctly as per the operation manual for the device. Is composite video signal sent to pin (20) of SCART2 (SC1200)?YES

NO


Is RGB signal sent to pins (15), (11) and (7) of SCART2 (SC1200)?YES

NO


Is Y/C signal sent to pins (20) and (15) of SCART2 (SC1200)?YES

NO



NO

Are RGB signals (R2, G2 and B2) sent to input terminal pins (31), (27) and (29) of IC1203 (VSELECTOR)?YES

NO

Is Y/C signal (IN2Y/C2) sent to input terminal pins (79) and (1) of IC1203 (V-SELECTOR)?YES

NO


NO


Is RGB signal (R/G/B-SIG) sent from output terminal pins (54), (56) and (55) of IC1203 (VSELECTOR)?YES

NO


Is Y/C signal (Y/CSIG) sent from output terminal pins (52) and (50) of IC1203 (VSELECTOR)?YES

NO



NO


Is RGB signal (R/G/B-SIG3) sent to input terminal pins (54), (48) and (43) of IC3701 (A/D-CONV)?YES

NO

Check pins (54), (56) and (55) of IC1203 (V-SEL), Q3712/11/10 and peripheral circuits.


NO


Is digital signal (R/G/B-8bit) sent to input terminal pins (45/69) - (55/46) of IC3300 (VPROCESSOR)?YES

NO

Check pins (66) and (64) for ADHS/VS signal, IC3701 (A/DCONV) and peripheral circuits.NO




NO

Is digital RGB-right signal (RR**/RG**/RB**) sent from pins (203) and (2) - (16) and (23) of IC4502 (LCD-CONTROL), and is digital RGB-left signal (LR**/LG**/LB**) sent from pins (26) and (33)- (47) and (54)?YES

NO


NO


42



EXT3 in trouble.

EXT3-COMPONENT (Y, Pb and Pr) in trouble.


Confirmation of the settings: 1) Is "INPUT SOURCE" button on the remote control set up correctly?See the operation manual and set "INPUT SOURCE" to "EXT1". 2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to "MIN"?Set it to an appropriate level. 3) Check the connection to the external deviceConnect it correctly as per the operation manual for the device. Is composite video signal sent to pin (5) of A/V-INTERMINAL (J1202)?YES

NO

Check external connection, input setting, A/V-INTERMINAL (J1202) and peripheral circuits. Check A/V-INTERMINAL (J1202) and peripheral circuits.

Is IN3-Y signal sent to pin (6) of A/V-INTERMINAL (J1201), and is Cb/C/r signal sent to pins (4) and (6) of A/V-INTERMINAL (J1201)?YES

NO

Check external connection, input setting, A/V-INTERMINAL (J1201/1202) and peripheral circuits. Check A/V-INTERMINAL (J1201/1202) and peripheral circuits.

Is Y/C signal sent to pins (3) and (4) of S-TERMINAL (J1200)?YES

NO

Check external connection, input setting, STERMINAL (J1200) and peripheral circuits. Check STERMINAL (J1200) and peripheral circuits.


NO

Is component signal (IN3-Y/Cb/Cr) sent to input terminal pins (33), (35) and (37) of IC1203 (VSELECTOR)?YES

NO

Is Y/C signal (IN3Y/C) sent to input terminal pins (5) and (7) of IC1203 (V-SELECTOR)?YES

NO


NO


Are component signals (Y, Cb and Cr) sent from output terminal pins (60), (59) and (58) of IC1203 (VSELECTOR)?YES

NO


Is Y/C signal (Y/CSIG) sent from output terminal pins (52) and (50) of IC1203 (V-SELECTOR)?YES

NO



NO


Are component signals (Y, Cb and Cr) sent to input terminal pins (246), (232) and (225) of IC3300 (VPROCESSOR)?YES

NO

Check IC3300 (VPROCESSOR), Q3700 Q3705 and peripheral circuits.


NO



NO



NO

Is digital RGB-right signal (RR**/RG**/RB**) sent from pins (203) and (2) - (16) and (23) of IC4502 (LCD-CONTROL), and is digital RGB-left signal (LR**/LG**/LB**) sent from pins (26) and (33)- (47) and (54)?YES

NO


NO


43



EXT4 (HDMI) in trouble. Confirmation of the settings: 1) Is "INPUT SOURCE" button on the remote control set up correctly?See the operation manual and set "INPUT SOURCE" to "EXT4". 2) Have you checked the type of video signal sent from HDMI-connected external device?Confirm the type (it should be "RGB", "YCbCr 4:4:4" or "YCbCr 4:2:2"). 3) Is ANT-cable disconnected, or incorrectly connected?Connect it correctly as per the operation manual.YES

Is "EXT4" selected with button on the remote control?YES

NO

Select "EXT4" with button on the remote control. From MENU-Option-HDMI Setup-Signal Type, select a signal type ("RGB", "YCbCr 4:4:4" or "YCbCr 4:2:2").

Is the type of video signal (Signal Type) from HDMIconnected external device set?YES

NO

Check IC1904 (HDMIRECEIVER) and peripheral circuits. Check the connection between HDMICONNECTOR (SC1900) and pins (59) and (58) (71) and (70) of IC1904 and peripheral circuits.

YES

Is digital signal sent to pins (59) and (58) (71) and (70) of IC1904 (HDMI-RECEIVER)?NO

NO

Are Y, Pr and Pb signals sent to pins (39), (41) and (43) of IC1203 (V-SELECTOR)?YES

YES

Is digital signal sent to pins (16) and (15) (3) and (1) of HDMICONNECTOR SC1900?NO

Are Y, Cb and Cr signals sent from pins (60), (59) and (58) of IC1203 (V-SELECTOR)?YES

NO

Check IC1203 and peripheral circuits. Check output of IC1203, Q3700 Q3705 and peripheral circuits.

Check the soldering of pins (16) and (15) (3) and (1) of HDMI-CONNECTOR SC1900, and check that HOTP-CONT signal is sent from microcomputer (IC2001).

Are Y, Cb and Cr signals sent to pins (246), (232) and (225) of IC3300 (V-PROCESSOR)?YES

NO


NO



NO

Is digital RGB-right signal (RR**/RG**/RB**) sent from pins (203) and (2) - (16) and (23) of IC4502 (LCDCONTROL), and is digital RGB-left signal (LR**/LG**/LB**) sent from pins (26) and (33)- (47) and (54)?YES

NO


NO


44


TROUBLE SHOOTING TABLE (Continued)

No picture and no soundIs the power LED lit green?YES NO

Is the power LED flashing red?YES

NO

Is the power cord normal?

NO

Replace the power cord.

Did it flash once?NO

YES

Go to "The backlight does not light".

Did it flash twice?NO

YES

Check the power unit.

Did it flash 3 times?YES

YES

Check the temperature of the unit.

Does the backlight fail to light?YES

Go to "No Picture".

Go to "The backlight does not light".

LED flashing timing chartType of error Lamp error Flashes once: Fast Monitor power error Flashes twice LED operation (1 cycle) H: Lit L: Not lit H: Lit L: Not lit

250ms

1s

Monitor temperature H: Lit error Flashes 3 times L: Not lit

45


TROUBLE SHOOTING TABLE (Continued)The backlight does not light.

Do all fluorescent lamps fail to light?YES

NO

Check the fluorescent lamps that do not light.Replace the blown fuse(F703) or R1765 and turn on the power. If the backlight still fails to light, check the area that has shorted out.In the POWER-UNIT: Is approximately 380 VDC output to CN702? Check that the RC701 operates properly.Is each control signal sent to CONNECTOR-CN1704 and CN1703 in the POWER UNIT? (VCC 2(14V), OFL1, INVOSC)

YES

Replace the fluorescent lamps that do not light.Mainly check T7501, T7502 and their peripheral circuits as well as Z7501 and its peripherals.

In POWER UNIT: Check the fuse of the circuit for INVERTER-UNIT. Has the F703 2.0A in the POWER-UNIT blown? Is the value for R1765 1 correct?NO

YES

YES

In the INVERTER-UNIT: Is the power supplied between pins 1 and 2 of CONNECTOR-PN7501? (Pins 1 and 2 on the measuring point PN7501; 380 VDC)YES

NO

YES

Check the connections of INV-PN7501 and POWER-CN702.

In the INVERTER-UNIT: Is each control signal sent to PN7503? (VCC 2(14V)_ 1Pin , OFL1_6Pin, INV-OSC_3Pin RETURN_2Pin)YES

NO

NO

Check the OFL1 and INVOSC-LINE of CONNECTOR-P4101 in the MAIN-UNIT and UR14V-LINE in the POWER-UNIT.

In the INVERTER-UNIT: Is the control signal of Z2501 (INV-CTL)(STR-H2013) output correctly? (PDRV1/V2(22)(20)Pin)YES

NO

Replace the Z2501 (INV-CTL)(STRH2013).

Check the photocoupler (PC 7501-22) and the output transformer (T7503-25). Also check the lamp connector connection.

46


TROUBLE SHOOTING TABLE (Continued)The backlight turns on, but no picture appears on the LCD.

Is the power supplied to MAIN-PWB? (P1800: +14V/UR4.5V/UR+3.5/BU+3.3V)YES

Adjustment process menu: When the PATTERN 1 is set to 2, is the gradation pattern displayed correctly?YES

NO

Is the VLS voltage (VLS15V) of the IC4104 (DC/AC-CONV) output normal?YES

NO

Check IC4104 (DC/AC-CONV) and its peripheral circuits.

Is the output signal of IC4601 (LVDS) sent correctly?YES

NO

Check IC4502 (LCD-CTL).

Is the VGL voltage (-6V) of the IC4104 (DC/AC-CONV) output normal?YES

NO


Is the input signal of IC4601 (LVDS) sent correctly?YES

NO

Check IC330 (V-PROCESSOR).

Is pin 25 "LVDS-PD" of IC4601 (LVDS) "H"?YES

NO

Check IC2007 (CPLD).

Is the VGH voltage (34V) of the IC4104 (DC/AC-CONV) output normal?YES

NO


Check IC4502 (LCD-CTL).

Check IC4601 (LVDS) and its peripheral circuits.

A data bit is missing. (Gradation-related)

Adjustment process menu: When the PATTERN 1 is set to 2, is the gradation pattern displayed correctly?YES

NO

Check the connection of SC4651 and SC4652 of LCD-PANELFPC, IC4502 (LCD-CTL) and its peripheral circuits.

When the QC drive is turned on or off in Menu-Option-Quick Shoot, is missing of data bit resolved?YES

NO

Check IC4601 (LVDS) and its peripheral circuits.

Go to When the QC drive is turned on, noise appears in the moving picture.

47


When the QC drive is turned on, noise appears in the moving picture.Is IC4501 (E2PROM) mounted properly?YES NO

Mount IC4501 (E2PROM) properly. Check IC4502 (LCD-CTL) thru IC4503 (64M-SDRAM) and their peripheral circuits. Check IC4501 (E2PROM) thru IC4502 (LCD-CTL) and their peripheral circuits.

Is the amplitude of each terminal of IC4503 (64M-SDRAM) approx. 3.3V?YES

NO

Is the waveform amplitude of pins 5 and 6 of IC4501 (E2PROM) normal?YES

NO

Check IC4502 (LCD-CTL) and its peripheral circuits.

The display is entirely whitish. (LCD power)Adjustment process menu: When the PATTERN 1 is set to 2, is the gradation pattern displayed correctly? (Is it whitish or dark?)NO YES

Check the connection between IC4601 (LVDS) and IC4502 (LCD-CTL).

Is COM BIAS adjusted properly?YES

NO

Readjust COM BIAS. Check IC4104 and its peripheral circuits (VLS, VGH, VGL).

Is the output voltage of IC4104 (DC/DC-CONV) appropriate? (VLS, VGH, VGL)YES

NO

Check LCD-PANEL-CONNECTOR (SC4651, 4652) and the FPC connection.

48


MAJOR IC INFOMATIONS IC1203 (MM1630AQ) This is a video switch with I2C BUS control, which can switch 4 Colour difference signal lines (component signal), 1 S video signal line and 4 composite signal lines. Analog video signals sent from each input terminal and the tuner are fed to and selected by this IC. Video output signals and component video signals sent from here are fed to the video processor circuit IC3300 (IXB405WJ). IC3300 (IXB405WJ) This video processor consists of highly-integrated system-on-chip devices. It is equipped with a high-accuracy 10-bit ADC of 108 MHz to perform high-accuracy data processing. For the analog video processing, the high-performance multi-format 3D digital Y/C separation type video recorder that supports NTSC is supported. For PAL and SECAM, a motion adaptive de-interlacing engine and video format conversion engine are supported. 10-bit video signal processing is performed from the input to the video output. IC4601 (DS90CF386) The DS90CF386 is an LVDS receiver for communication with the video processor on the front stage, which converts 4 pairs of LVDS data stream to 28-bit CMOS/TTL parallel data (24 bits of RGB and 4 bits of HSYNC, VSYNC, DE and CNTL). The output is a down edge strobe. This output signal is sent to the panel controller on the next stage. IC4502 (IXB326WJ) This IC is a timing controller for the LCD panel with overdrive function driving a panel of 960 x 540. IC4503 (IXB029WJ) This is a 64-Mbit SDRAM for the overdrive function of IC4502 (IXB326WJ). Data is read into IC4502 (IXB326WJ) at start-up. IC4501 (IXB375WJ: 26, IXB438WJ: 32, IXB439WJ: 37) This is an EEPROM for storing LUT of IC4502 (IXB326WJ). IC2007 (IXB495WJ) This is a CPLD (Complex Programmable Logic Device) with extension I/O for the main microprocessor and other functions. This CPLD is operated with backup power since it operates in sync with IC2001 (IXB427WJ) microprocessor. IC4602 (IXB445WJ) This is a CPLD (Complex Programmable Logic Device) for generating timing signals for driving the LCD panel. This CPLD operates with IC4502 (IXB326WJ), the timing controller for the LCD panel with overdrive function. Note: If this CPLD is turned on with no power supplied to the panel, the panel may be damaged when any error occurs. IC4101 (BD8133FV) This is an IC for generating gradation reference voltage for the TFT LCD panel. It incorporates a gradation output buffer amplifier 18 circuit, CMOS buffer amplifier and reference voltage generator. The serial data control section consists of a register storing data from each terminal of LATCH, CLK and SDIN and a DAC circuit which receives the output from that register and provides adjustment voltage to each section. IC2501 (MSP3453G) This is an audio decoding IC. It is designed to decode S-IF signals and select input audio data. IC2500 (NJU26901) This is a delay IC for digital audio. It incorporates a memory that can delay the timing of the 2-channel audio signal output to correct the timing of the image delayed by digital processing and audio.

49


IC3901/3900 (TDA7480) This is a class-D audio output amplifier. For the output stage, as in the case of the switching power supply, the switching technology is adopted. Therefore the output stage corresponds to the switching circuit. The merit of the class-D technology is high circuit efficiency and less power loss. IC2001 (IXB427WJ) This is a main microprocessor, which communicates with the display section and operates the system. The entire system is IC-controlled. IC1904 (SiI9021) This is a digital interface receiver with the High-bandwidth Digital Content Protection (HDCP) constructed of the Dual-Input type TMDS (Transition-Minimized Differential Signaling). It supports both HDMI (High-Definition Multimedia Interface) and DVI (Digital Visual Interface).

50


-MEMO-

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BLOCK DIAGRAM-

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